In the book He Pou Tātaki - How ERO Reviews Early Childhood Service it is very clear about the expectation for collaboration of everyone involved in the ECE service.  One of the contributing elements to Pou Arahi is:
"Establishing and developing the organisation culture of the service " under this element an indicator of good practice is:

"Collaborative ways of working are fostered with everyone involved in the service. "

This is a very broad view of collaboration that includes everyone in aspects such as:

self review,

strategic planning,

annual plans,

assessment & planning,

staff appraisals, 

policy & philosophy review.

 Everyone includes teachers, children, whānau, managers and board members in varying degrees depending on what you are looking at.  If we are truly seeking the best for our tamariki having a broad base perspective will assist us as we refining and reflect on our practices because it will not be about one person's perspective any more but rather they ideas of the collective.   As we gather everyone's ideas and thoughts then filter these with current research we will have self review, planning, assessment etc that is rich with   knowledge, culture and passions.